This paper discusses the application of spiral wound tube heat exchangers in propane dehydrogenation process. The problems of traditional tubular heat exchangers in propane dehydrogenation process are analyzed, and the structure, working principle and characteristics of spiral wound tube heat exchangers, including high efficiency, compactness and multi-media heat exchange capacity, are expounded. Through the comparison with traditional tubular heat exchangers and the actual case analysis, the advantages of spiral wound tube heat exchangers in improving heat exchange efficiency, reducing energy consumption and carbon emissions, and improving propylene yield are demonstrated. At the same time, the application cases and process parameters of spiral wound tube heat exchangers in propane dehydrogenation process are elaborated in detail.